Изменения кристаллической структуры и фазовые превращения в системе Co7(Se1-yTey)8

Abstract

The Co7(Se1-yTey)8 compounds have been synthesized and studied by means of X-ray diffraction, thermal expansion and magnetization measurements in a wide temperature inter-val from 20 up to 720 oС. It has been found that the substitution of Te for Se leads to changes in space group due to the disordering of vacancies in cationic layers. Anomalous behavior of the thermal expansion coefficient and magnetization associated with phase transformations have been observed in the range temperature 350 – 500 oС.